package day07;
/**
 * 需求：生成？位验证码（大写字母 小写字母 数字）
 */
public class VerficationCode {
    public static void main(String[] args) {
       /* String code = generateVeriCode(4);
        System.out.println("验证码:"+code);

    }
    public static String generateVeriCode(int leg){
        String code="";
        char[] chs={'a','b','c','d','e','f','g','h','i','j','k','l','m','n','o','p','q','r','s','t','u','v','w','x','y',
                'z','A','B','C','D','E','F','G','H','I','J','K','L','M','N','O','P','Q','R','S','T','U','V','W', 'X','Y',
                'Z','0','1','2','3','4','5','6', '7','8','9'};
        for (int i=1;i<=leg;i++){
            int index=(int)(Math.random()*chs.length);//随机下标（0到61的）
            code+=chs[index];
        }


        return code;*/
















        /*String code= generateVeriCode(4);
        System.out.println("验证码："+code);



    }
        public static String generateVeriCode(int leg){
        String code="";
            char[] chs={'a','b','c','d','e','f','g','h','i','j','k','l','m','n','o','p','q','r','s','t','u','v','w','x','y',
                    'z','A','B','C','D','E','F','G','H','I','J','K','L','M','N','O','P','Q','R','S','T','U','V','W', 'X','Y',
                    'Z','0','1','2','3','4','5','6', '7','8','9'};
            for(int i=1;i<=leg;i++){
                int index=(int)(Math.random()*chs.length);
                code+=chs[index];
            }

        return code;*/








        String chor=generateVeriCode(4);
        System.out.println("验证码:"+chor);


        }
        public static String generateVeriCode(int leg){
        String chor="";
            char[] chs={'a','b','c','d','e','f','g','h','i','j','k','l','m','n','o','p','q','r','s','t','u','v','w','x','y',
                    'z','A','B','C','D','E','F','G','H','I','J','K','L','M','N','O','P','Q','R','S','T','U','V','W', 'X','Y',
                    'Z','0','1','2','3','4','5','6', '7','8','9'};
            for (int i=1;i<=leg;i++){
                int index= (int)(Math.random()*chs.length);
                chor+=chs[index];


            }

        return chor;
        }

}
